Timer



Aug. 21, 1928.

C. F. ROGERS' TIMER Filed April 14, 1926 INVENTOR. [44845.9/1'50 55 A TTORNEY.

Patented Aug. 21, 1928.

UNITED STATES CHARLES F. ROGERS, OF DETROIT, MICHIGAN.

TIMER.

A Application fi1ed April 14, 1926. Serial No. 101,846.

This invention relates to timers, and the object of the invention is to provide a timer having a revolvable contact member and in which the contact member is held at right angles with the contacts which it is adapted to pass over.

A further. object of the invention is to provide a timer in which the contact mem fully described and claimed, and the preferred form of construction by which these objects are attained is shown in the accompanying drawings in which Fig. 1 is an elevation of the complete timer.

Fig. 2 is a section taken on line 22 of Fig. 1.

Fig. 3 is a perspective view of the contact member.

As shown in Fig. 1, the timer comprises an outer shell 1 having an inner fiber ring 2 in which the contacts 3 are embedded. These contacts 3 lead out to the terminals 4 as is the usual practice. At the center a tubular member 5 is provided which is secured to the shaft 6 and a tubular extension 7 is provided on the side thereof as shown in Figs. 1 and 2. This tubular member 7 is provided with v two slots 8 in which the ends 9 of the contact member 10 are adapted to ride, and the contact member 10 is provided with a stem 11 of smaller diameter which extends into the tubular member 7 and provides clearance for the spring 12 thereabout. The spring 12 forces the contact member 10 outwardly so that it is adapted to engage the contacts 3 during rotation of the shaft 6. For this reason the outer end of the member 10 including the cylindrical portion 13 and ends 9 is cut on an arc and extends transversely of the ring 2 and contacts 3, and the member 10 is provided with a. cylindrical portion 13 which fits closely within the tubular portion 7. The ends 9 engaging in the slots 8 prevent the member 10 from turning the holder 7 and the curved outer face of the contact member 10 allows the contact member to ride smoothly around the inner face of the ring 2 and contacts 3 and at the same time the contact between the parts is properly maintained so that current may readily flow.

From the foregoing description it becomes evident that the device is very simple and eflicient in operation; will not easily get out of order; is composed of few parts, and is of consequent low manufacturing cost and provides a device which accomplishes the objects described.

Having thus fully described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is A timer comprising a housing, an insulating ring in the housing, a series of contacts embedded in the insulating ring, a shaft extending into the housing, a. sleeve secured to the said shaft, a tubular portion extending from one side of the sleeve and having a pair of diametrically opposite slots in the outer end thereof, a contact member comprising a cylindrical head fitting the inner diameter of the tubular member, a pair of lugs extending from opposite sides of the head and engaging in the slots of the tubular member, a stem secured to the head and extending into the tubular member, a spring about the stem tending to force the contact member into engagement with the insulating ring and contacts carried thereby, the head of the contact member forming a seat for the said spring, the outer face of the cylindrical head and lugs being cut to arcuate form with the axis thereof extending in parallel relation to the axis of the insulating ring, the axis of the said arcuate face intersecting the longitudinal axis of the contact member.

In testimony whereof I sign this specification.

CHARLES F. ROGERS. 

